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  <a href="#" class="list-group-item active">第十二章</a>
  <a href="edu_12_1_1.html" class="list-group-item">【例12-1-1】表单的使用实例</a>
  <a href="edu_12_2_1.html" class="list-group-item">【例12-2-1】定义域和域标题实例</a>
  <a href="edu_12_3_1.html" class="list-group-item">【例12-3-1】单行文本输入框实例</a>
  <a href="edu_12_3_2.html" class="list-group-item">【例12-3-2】复选框与单选钮的应用</a>
  <a href="edu_12_3_3.html" class="list-group-item">【例12-3-3】图像按钮实例</a>
  <a href="edu_12_3_4.html" class="list-group-item">【例12-3-4】三种按钮的应用</a>
  <a href="edu_12_3_5.html" class="list-group-item">【例12-3-5】文件选择框与隐藏框的应用例</a>
  <a href="edu_12_4_1.html" class="list-group-item">【例12-4-1】征求意见表 testarea</a>
  <a href="edu_12_5_1.html" class="list-group-item">【例12-5-1】下拉列表框的应用 select-option</a>
  <a href="edu_12_6_1.html" class="list-group-item">【例12-6-1】综合实例</a>
  <a href="exp_12_1.html" class="list-group-item">【实验12-1】登录页面</a>
  <a href="exp_12_2.html" class="list-group-item">【实验12-2】应聘页面</a>
  <a class="list-group-item" href="../index.html"><span class="glyphicon glyphicon-menu-left" aria-hidden="true"></span> 返回首页</a>
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